CN112005013B

CN112005013B - Scroll compressor and method of manufacturing the same

Info

Publication number: CN112005013B
Application number: CN201880092607.3A
Authority: CN
Inventors: 松井友寿; 岩崎俊明; 横山哲英; 高村祐司; 河村雷人; 矢野贤司; 石园文彦; 宫本优作
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2018-04-27
Filing date: 2018-04-27
Publication date: 2022-04-19
Anticipated expiration: 2038-04-27
Also published as: JP6910544B2; WO2019207783A1; JPWO2019207783A1; CN112005013A

Abstract

The scroll compressor of the present invention comprises: a fixed scroll having a fixed platen provided with a first swirl protrusion; an oscillating scroll having an oscillating platen provided with a second scroll projection engaged with the first scroll projection, and forming a compression chamber for compressing refrigerant with the fixed scroll; a frame for supporting the oscillating scroll so as to be freely oscillated; and a main body housing that houses the fixed scroll, the oscillating scroll, and the frame. The fixed scroll and the frame are fixed to an inner wall surface of the main body casing. A first recess is formed in a surface of the fixed platen on a side facing the frame. A second recess is formed in the frame at a position facing the first recess.

Description

Scroll compressor and method of manufacturing the same

Technical Field

The present invention relates to a scroll compressor used for an air conditioner, a refrigerator, or the like, and a method for manufacturing the same.

Background

Conventionally, a scroll compressor is known as a compressor used for an air conditioner, a refrigerator, or the like. For example, in a scroll compressor disclosed in patent document 1, an outer wall projecting toward a fixed scroll is provided on an outer peripheral portion of a frame, and the frame has a concave shape. In this scroll compressor, an oscillating scroll is provided in a recess of a frame. In this scroll compressor, the frame and the fixed scroll are fixed in phase by a fixing member such as a bolt or a pin by an outer wall of an outer peripheral portion of the frame.

Patent document 1: japanese laid-open patent publication No. 3-74588

In the scroll compressor disclosed in patent document 1, since the oscillating scroll is provided in the recess of the frame, the space in which the oscillating scroll oscillates is reduced by the thickness of the outer wall of the frame. In particular, in the scroll compressor, the frame and the fixed scroll are fixed in phase by the fixing member such as a bolt or a pin by the outer wall of the frame, and therefore the width of the outer wall of the frame becomes large, and the space in which the oscillating scroll oscillates becomes small.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a scroll compressor capable of increasing the space in which an oscillating scroll oscillates, and a method for manufacturing the same.

The scroll compressor of the present invention includes: a fixed scroll having a fixed platen provided with a first swirl protrusion; an oscillating scroll having an oscillating platen provided with a second scroll projection engaged with the first scroll projection, the oscillating scroll forming a compression chamber for compressing refrigerant with the fixed scroll; a frame that supports the oscillating scroll so as to be freely oscillated; and a main body case that houses the fixed scroll, the orbiting scroll, and the frame, wherein the fixed scroll and the frame are fixed to an inner wall surface of the main body case, a first recess for phase alignment of assembly is formed in a surface of the fixed platen on a side facing the frame, and a second recess for phase alignment of assembly is formed in the frame at a position facing the first recess.

According to the present invention, the fixed scroll and the frame are fixed to the inner wall surface of the main body casing, and the fixed phase between the fixed scroll and the frame is performed by the first recess and the second recess, so that the fixed phase between the frame and the fixed scroll can be performed, and the fixing member such as a bolt or a pin for fixing can be omitted or simplified. Therefore, in the scroll compressor of the present invention, the outer wall of the frame can be omitted or thinned, and thus the space in which the orbiting scroll oscillates can be increased in size.

Drawings

Fig. 1 is a vertical sectional view showing an internal structure of a scroll compressor according to embodiment 1 of the present invention.

Fig. 2 is a schematic view of a scroll compressor according to embodiment 1 of the present invention, and is a schematic view showing a main part of a compression mechanism in an enlarged manner.

Fig. 3 is a schematic view of the scroll compressor according to embodiment 1 of the present invention, and is a schematic view showing a state in which the phase fixing member inserted into the first recess is pulled out.

Fig. 4 is a schematic view of a scroll compressor according to embodiment 2 of the present invention, and is a schematic view showing a main part of a compression mechanism in an enlarged manner.

Fig. 5 is a schematic view of a modification of the scroll compressor according to embodiment 2 of the present invention, and is a schematic view showing a main part of the compression mechanism in an enlarged manner.

Fig. 6 is a schematic view of a modification of the scroll compressor according to embodiment 2 of the present invention, and is a schematic view showing a state in which the phase fixing member inserted into the first recess and the second recess is pulled out.

Fig. 7 is a schematic view of a scroll compressor according to embodiment 3 of the present invention, and is a schematic view showing a main part of a compression mechanism in an enlarged manner.

Fig. 8 is a schematic view of a scroll compressor according to embodiment 4 of the present invention, and is a schematic view showing a compression mechanism portion in a plan view.

Fig. 9 is a schematic diagram showing a configuration in which a parallel key is used as a phase determining member.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. The configuration described in each drawing can be appropriately modified in shape, size, arrangement, and the like within the scope of the present invention.

Embodiment 1.

First, the structure and operation of the scroll compressor 100 will be described with reference to fig. 1 and 2. Fig. 1 is a vertical sectional view showing an internal structure of a scroll compressor according to embodiment 1 of the present invention. Fig. 2 is a schematic view of a scroll compressor according to embodiment 1 of the present invention, and is a schematic view showing a main part of a compression mechanism in an enlarged manner. The scroll compressor 100 according to embodiment 1 is one of the components of a refrigeration cycle used in various industrial devices such as a refrigerator, a freezer, an air conditioner, a refrigerator, and a water heater.

The scroll compressor 100 sucks and compresses a refrigerant circulating in a refrigeration cycle, and discharges the refrigerant in a high-temperature and high-pressure state. As shown in fig. 1, a scroll compressor 100 includes a compression mechanism 2 in which a fixed scroll 3 and an oscillating scroll 4 oscillating with respect to the fixed scroll 3 are combined in a main body casing 1 having an outer contour. The scroll compressor 100 further includes a motor 7 inside the main body casing 1.

As shown in fig. 1, the main body casing 1 is formed in a cylindrical shape having a closed space and has pressure resistance. The main body casing 1 is composed of a cylindrical main casing 1a, a substantially hemispherical upper casing 1b that closes the upper surface opening of the main casing 1a, and a substantially hemispherical lower casing 1c that closes the lower surface opening of the main casing 1a. The upper case 1b and the lower case 1c are fixed to the main case 1a by welding or the like.

A suction pipe 12 connected to introduce the refrigerant into the main body casing 1 and a power supply unit 19 for supplying power to the scroll compressor 100 are provided on a side surface of the main body casing 1. A discharge pipe 13 for discharging the compressed refrigerant from the main body casing 1 is connected to the upper surface of the main body casing 1. On the upper side of main casing 1, frame 5 that supports orbiting scroll 4 so as to be able to oscillate is fixed to the inner wall surface of main casing 1a by shrink fitting or the like. Further, an oil reservoir 11 for storing lubricating oil is provided at the bottom of the main body case 1.

As shown in fig. 1, the fixed scroll 3 includes a fixed platen 3a and a first spiral protrusion 3b provided on a lower surface of the fixed platen 3a. The orbiting scroll 4 includes an orbiting platen 4a and a second spiral protrusion 4b provided on the upper surface of the orbiting platen 4a and meshing with the first spiral protrusion 3b. The oscillating scroll 4 is eccentrically disposed with respect to the fixed scroll 3. The first scroll 3b of the fixed scroll 3 and the second scroll 4b of the orbiting scroll 4 are combined to form a compression chamber 20 for compressing the refrigerant.

The fixed scroll 3 has an outer peripheral surface of a fixed platen 3a fixed to an inner wall surface of the main casing 1a by shrink fitting or the like. The reason why the outer peripheral surface of the fixed platen 3a is fixed to the inner wall surface of the main casing 1a is as follows: since the fixed scroll 3 can be heat-fitted by the wide inner and outer circumferential surfaces of the main casing 1a, workability can be improved, and the manufacturing process can be stabilized as compared with, for example, the case where the fixed scroll is heat-fitted to the upper casing 1b. However, the fixed scroll 3 may be formed by thermally fixing the outer peripheral surface of the fixed platen 3a to the inner wall surface of the upper casing 1b.

A discharge port 14 is formed in the center of the fixed platen 3a, and the discharge port 14 is used for discharging a refrigerant that has been compressed to a high temperature and a high pressure. The compressed high-temperature and high-pressure refrigerant is discharged from the discharge port 14 to the high-pressure chamber 15 above the fixed scroll 3, and is discharged to the outside of the main body casing 1 through the discharge pipe 13. A discharge valve 16 for preventing the refrigerant from flowing backward is provided at the discharge port 14.

As shown in fig. 2, a first recess 8a is formed in a surface (lower surface in the illustrated example) of the fixed platen 3a of the fixed scroll 3 on the side facing the frame 5, and a phase positioning member 9 for assembly and phase alignment is inserted therein. The first recess 8a is formed radially outward of the region of the fixed platen 3a where the first vortex projection 3b is provided. The first concave portion 8a shown in the figure is a through hole, but is not limited to the through hole, and may be a structure with a closed upper surface. The phasing member 9 is, for example, a pin.

The oscillating scroll 4 performs an orbital motion with respect to the fixed scroll 3 without performing a rotational motion by means of a cross ring 17 for preventing a rotational motion. A surface (a lower surface in the illustrated example) of the swing base plate 4a on the side where the second spiral protrusion 4b is not formed functions as a swing scroll thrust bearing surface 40. A boss portion 41 having a hollow cylindrical shape is provided at the center of the orbiting scroll thrust bearing surface 40. The orbiting scroll 4 orbits on a thrust sliding surface of the frame 5 by the rotation of an eccentric shaft portion 6a of the main shaft 6 inserted into the boss portion 41.

The cross ring 17 is constituted by: the cross claw projecting upward is slidably accommodated in a cross groove formed in the orbiting scroll thrust bearing surface 40 of the orbiting scroll 4, and the cross claw projecting downward is slidably accommodated in a cross key groove formed in the frame 5.

As shown in fig. 1 and 2, the frame 5 is formed in a cylindrical shape that is tapered downward in a stepwise manner, and supports the orbiting scroll 4 so as to be swingable. An annular flat surface is formed on the upper surface of the frame 5. An annular thrust plate 50 made of a steel plate material such as air valve steel is provided on the flat surface. The thrust plate 50 functions as a thrust sliding surface of the frame 5. Further, a protruding wall 51 protruding toward the upper case 1b side is formed on the outer periphery of the flat surface of the frame 5. The upper surface of the protruding wall 51 serves as the upper end surface of the frame 5. The projecting wall portion 51 is formed in such a manner that the upper surface is substantially flush with the upper surface of the thrust plate 50. The end surface on the side supporting the orbiting scroll 4 is not limited to the upper surface of the projecting wall 51 shown in the figure, and may be an upper surface of another component.

The frame 5 is disposed so as to be spaced apart from the fixed platen 3a by a target distance S between the upper surface of the projecting wall 51, which is the end surface on the side supporting the orbiting scroll 4, and the fixed platen 3a₁. That is, the fixed platen 3a of the fixed scroll 3 is not joined to the upper end surface of the frame 5, and the fixed scroll 3 and the frame 5 are not in direct contact with each other. A second recess 8b is formed in the projecting wall portion 51 of the frame 5 at a position facing the first recess 8a, and the second recess 8b is used for inserting the phase fixing member 9 common to the first recess 8a.

As shown in fig. 1, a main bearing 60 is formed at the center of the frame 5, and the main bearing 60 radially supports the main shaft 6 that is rotationally driven by the motor 7. Further, the oil return pipe 52 is inserted into and fixed to a discharge hole formed through the inside and outside of the frame 5. The oil return pipe 52 is a pipe for returning the lubricating oil stored in the tube of the frame 5 to the oil reservoir 11.

The motor 7 includes an annular stator 7a fixedly supported by shrink fitting or the like on the inner wall surface of the main body case 1, and a rotor 7b rotatably attached to face the inner surface of the stator 7a. The motor 7 drives the compression mechanism 2 connected via the main shaft 6.

The main shaft 6 is rotatably supported by a main bearing 60 provided at the center of the frame 5 and a sub bearing 62 provided at the center of an auxiliary frame 61 fixed to the lower portion of the main body case 1 by welding or the like. An eccentric shaft portion 6a rotatably supported by the boss portion 41 of the orbiting scroll 4 is provided at the upper end portion of the main shaft 6. The eccentric shaft portion 6a engages with the orbiting scroll 4 at an eccentric shaft eccentric from the rotation shaft. The main shaft 6 rotates with the rotation of the rotor 7b, and the orbiting scroll 4 is made to orbit by the eccentric shaft portion 6a. Further, an oil pump 61a is provided in the sub-frame 61. The lubricating oil sucked by the oil pump 61a is sent to each sliding portion through an oil supply hole 63 formed in the main shaft 6.

Further, the main shaft 6 is provided with a slider 18 with a balance weight. The balance weight is provided to cancel the centrifugal force of the oscillating scroll 4 generated by the oscillating motion. The balance weight is disposed on the side opposite to the direction of the centrifugal force acting on the orbiting scroll 4. The scroll compressor 100 can reduce the pressing of the second scroll protrusion 4b by the first scroll protrusion 3b by the balance weight.

The slider 18 is rotatably inserted into the boss portion 41. An eccentric shaft portion 6a is inserted into a sliding surface of the slider 18. That is, the slider 18 is interposed between the orbiting scroll 4 and the eccentric shaft portion 6a of the main shaft 6, and supports the orbiting scroll 4 so as to make the orbiting scroll 4 orbit while changing the oscillating radius of the orbiting scroll 4.

Next, the operation of the scroll compressor 100 according to embodiment 1 will be briefly described. When the scroll compressor 100 starts operating, the refrigerant sucked into the suction pipe 12 enters the compression chamber 20 through a suction port (not shown) provided in the frame 5. The orbiting scroll 4 performs an eccentric orbiting motion by an eccentric shaft portion 6a of a main shaft 6 which is rotated by a motor 7. Specifically, the orbiting scroll 4 performs an orbital motion while being prevented from rotating by the cross ring 17. Thereby, the volume of the compression chamber 20 gradually decreases, and the refrigerant is compressed. The compressed refrigerant is discharged from the discharge port 14 of the fixed platen 3a to the high-pressure chamber 15, and is discharged to the outside of the main body casing 1 through the discharge pipe 13.

Next, design constraints of the compression chamber 20 of the scroll compressor 100 will be explained. The scroll compressor 100 has a structural limitation on the volume of the compression chamber 20 that compresses refrigerant. As a general structure of the scroll compressor 100, a compression chamber 20 is formed inside a cylindrical frame 5 fixed to an inner wall surface of a main body housing 1. The scroll compressor 100 is designed to accommodate the orbiting scroll 4 in the cylinder of the frame 5, and therefore, physical limitation of the scroll volume occurs. The volume of the compression chamber 20 is determined by the second swirl portion 4b provided in the swing platen 4a. Therefore, when the outer diameter of the swing platen 4a is small, the second scroll protrusion 4b is also small, and the volume of the compression chamber 20 is also small.

Here, in order to make the second vortex projection 4b large, the outer diameter of the swing platen 4a may be made large. But the outer diameter of the oscillating platen 4a is determined by the inner diameter of the cylinder interior of the frame 5. Therefore, in order to increase the outer diameter of the orbiting scroll 4 to the maximum extent to the vicinity of the inner wall of the body casing 1, it is conceivable to provide a target space S between the fixed platen 3a of the fixed scroll 3 and the upper end surface of the frame 5₁The structure of (1). However, in this case, since the fixed scroll 3 needs to be fixed to the inner wall surface of the main body casing 1 and the fixed platen 3a needs to be joined to the frame 5 without using a joining member, there is a problem in that the phase accuracy of the fixed scroll 3 and the frame 5 is ensured.

Specifically, the swirl design is a compression portion design, and high accuracy is required for meshing of swirl protrusions provided on the fixed scroll 3 and the orbiting scroll 4. In general, as is used in a conventional scroll compressor, the phase alignment between the swirl projecting portions is performed by a phase alignment pin. However, the oscillating scroll 4 performs an orbital motion, and therefore it is difficult to directly perform phase alignment with the fixed scroll 3 with a phase pin. Therefore, the general configuration is as follows: the fixed scroll 3 and the orbiting scroll 4 are indirectly phase-aligned by engaging the orbiting scroll 4 with the frame 5 by the cross ring 17 and fixing the fixed scroll 3 with the frame 5 by the phasing pin.

In the case of a structure in which the fixed scroll is fixed to the inner wall surface of the body casing 1, the oscillating scroll 4 and the frame 5 can be engaged with each other in phase alignment by the cross ring 17 as in the related art. However, since the fixed scroll 3 and the frame 5 are not directly fixed, it is necessary to change the phase alignment method from the conventional structure.

Generally, a structure in which the two members are fixed in rotational phase, one is used as a fulcrum, and the other is used to determine the rotational phase, is most easily assembled. Namely, a structure in which positioning is performed at two places. If the fixed scroll 3 and the frame 5 are fixed to the inner wall surface of the main body casing 1, it is difficult to apply the conventional technique of inserting two phase pins between the fixed scroll 3 and the frame 5. This is because, after the phases of the fixed scroll 3 and the frame 5 are determined, according to the conventional method of bolting the fixed scroll 3 to the frame 5, it is necessary to have machining accuracy in which the centers of the two pins coincide with the center of the outer diameter of the fixed scroll 3 fixed along the inner wall of the main body casing 1. Therefore, if a structure in which the outer peripheral surface of the fixed scroll 3 is fixed to the main body casing 1 is used, and a structure in which the rotational phase alignment is performed by one pin, that is, a structure in which the rotational phase alignment is performed at two positions with the center of the outer diameter of the fixed scroll 3 as a fulcrum, an effect that both processing and assembly are easy can be obtained.

In the scroll compressor 100 according to embodiment 1, the fixed scroll 3 is fixed to the inner wall surface of the main body casing 1, and the frame 5 is disposed so as to be spaced apart from the fixed platen 3a by a target distance S between the end surface on the side supporting the orbiting scroll 4 and the fixed platen 3a₁. That is, the scroll compressor 100 is configured such that the fixed platen 3a of the fixed scroll 3 is not joined to the upper end surface of the frame 5. Therefore, in the scroll compressor 100, the outer diameter of the swing platen 4a is not restricted by the inner diameter of the frame 5, and therefore the outer diameter of the swing platen 4a is enlarged to the vicinity of the inner wall of the main body casing 1 as a design space of the second spiral protrusion 4b. Thus, the scroll compressor 100 canThe capacity of the compression chamber 20 can be designed to be large, and the maximum horsepower can be increased. Further, by configuring the fixed platen 3a of the fixed scroll 3 so as not to be joined to the upper end surface of the frame 5, the outer wall surface of the frame 5 provided for joining to the fixed platen 3a can be omitted, and therefore, material cost can be reduced and weight can be reduced.

Further, in the scroll compressor 100, since the first recess 8a is formed in the fixed scroll 3 and the second recess 8b is formed in the frame 5 at a position facing the first recess 8a, for example, a pin serving as the common phase fixing member 9 can be inserted into the first recess 8a and the second recess 8b, and the assembly and the phase alignment can be performed. That is, the scroll compressor 100 can secure the phase accuracy between the fixed scroll 3 and the frame 5, and can increase the volume of the compression chamber 20 because the outer diameter of the swing platen 4a is enlarged to the vicinity of the inner wall of the body casing 1 as the design space of the second spiral protrusion 4b.

Next, a method for manufacturing a scroll compressor according to embodiment 1 will be described with reference to fig. 2 and 3. Fig. 3 is a schematic view of the scroll compressor according to embodiment 1 of the present invention, and is a schematic view showing a state in which the phase fixing member inserted into the first recess is pulled out.

As shown in fig. 2 and 3, the method for manufacturing a scroll compressor according to embodiment 1 includes the steps of: a frame fixing step of fixing the frame 5 to the inner wall surface of the main casing 1 a; a phase fixing step of inserting a phase fixing member 9 into the first recess 8a and the second recess 8b to fix the phase of the fixed scroll 3 and the frame 5 after the frame fixing step; a fixed platen fixing step of fixing the fixed platen 3a to the inner wall surface of the main casing 1a after the phase fixing step; and a pulling-out step of pulling out the phase fixing member 9 after the fixed platen fixing step.

Specifically, as shown in fig. 2, after the outer peripheral surface of the frame 5, which is the outermost portion in the radial direction, is fixed to the inner wall surface of the main casing 1a by shrink fitting or the like, the phase fixing member 9 is inserted into the first recess 8a and the second recess 8b, and the fixed phase between the fixed scroll 3 and the frame 5 is performed. The phasing member 9 is, for example, a pin. Then, the outer peripheral surface of the fixed platen 3a is fixed to the inner wall surface of the main casing 1a by shrink fitting or the like. Thus, the fixed scroll 3 and the frame 5 are rotated in a fixed phase. As shown in fig. 3, the pin serving as the phase positioning member 9 is pulled out from the first recess 8a and the second recess 8b after the outer peripheral surface of the fixed platen 3a is fixed to the inner wall surface of the main casing 1a. By pulling out the fixed phase member 9 from the first recess 8a and the second recess 8b, it is possible to avoid the fixed phase member 9 interfering with the orbiting scroll 4. As shown in fig. 2, the pins as the phase positioning members 9 can be held in a state inserted into the first recess 8a and the second recess 8b.

Therefore, in the method of manufacturing the scroll compressor according to embodiment 1, the size of the orbiting scroll 4 can be increased by removing the phase fixing member 9 from the first recess 8a and the second recess 8b. When the phase fixing member 9 is pulled out from the first recess 8a and the second recess 8b, the first recess 8a can be formed in the region inside the spiral teeth, which is the region where the first spiral protrusion 3b of the fixed platen 3a is provided. When the phase fixing member 9 is configured to be pulled out from the first recess 8a and the second recess 8b, a seal member (not shown) for suppressing the flow of the refrigerant through the first recess 8a can be provided in the first recess 8a. The sealing member may be formed by pulling out the phase fixing member 9 from the second recess 8b to remain inside the first recess 8a.

Embodiment 2.

Next, a scroll compressor 101 according to embodiment 2 of the present invention will be described with reference to fig. 4. Fig. 4 is a schematic view of a scroll compressor according to embodiment 2 of the present invention, and is a schematic view showing a main part of a compression mechanism in an enlarged manner. The same components as those of the scroll compressor described in embodiment 1 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

As described above, in the scroll compressor 100, the first recess 8a is formed in the fixed platen 3a, the second recess 8b is formed in the frame 5, and the common phase fixing member 9 is inserted into the first recess 8a and the second recess 8b, whereby the phase accuracy between the fixed scroll 3 and the frame 5 can be improved. However, if the upper end surface of the second recess 8b forming the frame 5 is too far apart from the fixed platen 3a and the length of the phase fixing member 9 is increased, the distance of the phase shift increases, and there is a possibility that the phase accuracy is lowered. The reason is as follows: for example, when the overlapping amount and the gap between the pin and the first recess 8a are the same as the conventional dimensions, the inclination angle is constant, but the phase shift distance increases as the length of the pin increases.

Therefore, the fixed scroll 3 of the scroll compressor 101 according to embodiment 2 is provided with the connecting plate portion 30 in which the first recess 8a is formed so as to project from the fixed platen 3a toward the frame 5. On the other hand, a second recess 8b is formed in the frame 5 at a position facing the first recess 8a. A pin as a phase positioning member 9 for assembling and performing phase alignment is fitted into the first recess 8a and the second recess 8b. That is, in the scroll compressor 100, since the length of the fixed phase member 9 can be shortened by providing the connecting plate portion 30 on the fixed platen 3a, the phase shift can be suppressed, and the phase accuracy between the fixed scroll 3 and the frame 5 can be improved.

The connecting disc part 30 is provided at a distance S equal to or greater than the thickness of the swing table 4a from the upper end surface of the frame 5₂. That is, the outer diameter of the swing platen 4a can be enlarged to a position adjacent to the phase fixing member 9. The oscillating platen 4a may be configured such that a part thereof always enters between the connecting disc 30 and the frame 5 during the orbital movement of the oscillating scroll 4, or may be configured such that a part thereof enters between the connecting disc 30 and the frame 5 at least once every orbital movement. Therefore, the scroll compressor 100 can secure the phase accuracy between the fixed scroll 3 and the frame 5, and the outer diameter of the swing base plate 4a is enlarged to the vicinity of the inner wall of the main body casing 1 as the design space of the second spiral protrusion 4b, so that the capacity of the compression chamber 20 can be increased, and the maximum horsepower can be increased.

The connecting disc portion 30 may be provided only at a portion where the fixed phase member 9 is provided, but is preferably provided along the entire circumference of the fixed scroll 3 in consideration of the rigidity of the fixed scroll 3 and the workability in manufacturing the fixed scroll 3.

Next, a modification of the scroll compressor 101 according to embodiment 2 will be described with reference to fig. 5 and 6. Fig. 5 is an explanatory view of a modification of the scroll compressor according to embodiment 2 of the present invention, and is a schematic view showing an enlarged view of a main part of the compression mechanism. Fig. 6 is a schematic view of a modification of the scroll compressor according to embodiment 2 of the present invention, and is a schematic view of a state in which the phase fixing member inserted into the first recess and the second recess is pulled out. The scroll compressor 101 shown in fig. 5 is configured such that the first recess 8a is a through hole penetrating the fixed platen 3a and the connecting disc portion 30. That is, in the scroll compressor 101 shown in fig. 5, the phase fixing member 9 fitted into the first recess 8a and the second recess 8b can be pulled out from the first recess 8a and the second recess 8b after the fixed phase between the fixed scroll 3 and the frame 5 is performed.

Specifically, after the outer peripheral edge of the frame 5 is fixed to the inner wall surface of the main casing 1a by shrink fitting or the like, the fixed-phase member 9 is inserted into the first recess 8a and the second recess 8b, and the fixed phase between the fixed scroll 3 and the frame 5 is performed. The phase fixing member 9 is, for example, a pin. Then, after the outer peripheral edge of the fixed platen 3a is fixed to the inner wall surface of the main casing 1a by shrink fitting or the like, the phase fixing member 9 is pulled out from the first recess 8a and the second recess 8b as shown in fig. 6. Thus, the fixed scroll 3 and the frame 5 are rotated in a fixed phase. The phase fixing member 9 may be kept inserted without being pulled out from the first recess 8a and the second recess 8b, as shown in fig. 4, for example.

Embodiment 3.

Next, a scroll compressor 102 according to embodiment 3 of the present invention will be described with reference to fig. 7. Fig. 7 is a schematic view of a scroll compressor according to embodiment 3 of the present invention, and is a schematic view showing a main part of a compression mechanism in an enlarged manner. Note that the same components as those of the scroll compressors described in embodiments 1 and 2 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

The connecting disc portion 30 in embodiment 3 is provided at a distance S smaller than the plate thickness of the swing platen 4a from the upper end surface of the frame 5₃. In addition, a reduced thickness portion 42 is formed in the oscillating scroll 4, and the reduced thickness portion 42 enters a gap provided between the connecting plate portion 30 and the frame 5. The swing table 4a may be configured to swingIn the orbiting motion of the scroll 4, the reduced thickness portion 42 may be always inserted between the joint 30 and the frame 5, or may be inserted between the joint 30 and the frame 5 at least once per one revolution. That is, in the scroll compressor 102, since the upper end surface of the frame 5 is brought close to the lower end surface of the connecting disc portion 30, the length of the phase fixing member 9 can be shortened, and phase shift can be effectively suppressed to improve phase accuracy. In the scroll compressor 102, the thickness-reduced portion 42 is provided only in the range of the position of the connecting plate portion 30 during the orbiting movement of the orbiting scroll 4, so that the entire orbiting platen 4a can be enlarged to a position adjacent to the fixed phase member 9. Therefore, the capacity of the compression chamber 20 can be increased, and the maximum horsepower can be increased.

Embodiment 4.

Next, a scroll compressor 103 according to embodiment 4 of the present invention will be described with reference to fig. 8. Fig. 8 is a schematic view of a scroll compressor according to embodiment 4 of the present invention, and is a schematic view showing a compression mechanism portion in a plan view. The same components as those of the scroll compressor described in embodiments 1 to 3 are denoted by the same reference numerals, and the description thereof will be appropriately omitted.

In general, the orbiting scroll 4 of the scroll compressor may have the orbiting platen 4a having a portion where the second boss 4b is erected and a portion where the orbit of the first boss 3b is formed. That is, considering a portion used as the compression mechanism section 2 during operation, it is not necessary that the swing platen 4a be substantially circular in plan view. Here, as shown in fig. 8, a straight line connecting the center portion O of the orbiting scroll 4 and the outer end portion 4c of the second spiral protrusion 4b is defined as an X axis, and a straight line passing through the center portion O of the orbiting platen 4a and orthogonal to the X axis is defined as a Y axis, and is divided into four quadrants a to D by the X axis and the Y axis. When a quadrant including the outer end portion 4C is defined as a first quadrant a, a second quadrant B and a third quadrant C are adjacent to the first quadrant a with respect to the oscillating table plate 4a of the oscillating scroll 4 which is not used as the compression mechanism portion 2. That is, the orbiting scroll 4 does not have a functional problem in compressing the refrigerant even if notches or the like are present in the second quadrant B and the third quadrant C.

Therefore, in the scroll compressor 103 according to embodiment 4, as shown in fig. 8, the

notch portions

43 and 44 are formed in the swing base plate 4a located in the second quadrant B and the third quadrant C adjacent to the first quadrant a. The connecting disc portion 30 is located in the second quadrant B when projected onto the XY plane constituted by the X axis and the Y axis. However, the connection disc portion 30 may be located in the third quadrant C when projected on the XY plane formed by the X axis and the Y axis. Although not shown in the drawings, in the configuration of embodiment 1, the phase fixing member 9 may be located in the second quadrant B or the third quadrant C when projected on the XY plane formed by the X axis and the Y axis.

That is, in the scroll compressor 103 according to embodiment 4, a portion of the swing base plate 4a where the second spiral protrusion 4b can stand and a portion which becomes the revolution locus of the first spiral protrusion 3b are enlarged to the vicinity of the inner wall of the main body casing 1 as the design space of the second spiral protrusion 4b. Therefore, the scroll compressor 103 can increase the capacity of the compression chamber 20 and can increase the maximum horsepower.

Although fig. 8 shows a configuration in which the

cutouts

43 and 44 are formed in the second quadrant B and the third quadrant C adjacent to the first quadrant a, the cutouts may be formed in at least one of the second quadrant B and the third quadrant C. In this case, the land portion 30 is provided at a position corresponding to the formed notch portion.

The present invention has been described above based on the embodiments, but the present invention is not limited to the configurations of the above-described embodiments. For example, the internal configuration of the illustrated scroll compressor 100 is not limited to the above, and may include other components. Fig. 9 is a schematic diagram showing a configuration in which a parallel key is used as a phase determining member. As shown in fig. 9, the second recess 8b may be a key groove, and the phase fixing member 10 may be a parallel key fitted into the first recess 8a and the second recess 8b. The parallel key is mounted to the pin or is integrally formed with the pin. By having parallel keys, phasing can be performed with one pin. Further, the parallel key of the fixed phase member 10 is the one according to embodiment 4 for convenience of explanation, but is not limited thereto and can be applied to the configurations of embodiments 1 to 3. In short, the present invention includes design changes and modifications to applications that are usually performed by those skilled in the art within a scope not departing from the technical idea thereof.

Description of the reference numerals

A main body housing; a main housing; an upper housing; a lower housing; a compression mechanism portion; a fixed scroll; fixing the bedplate; a first vortex projection; an oscillating scroll; oscillating the platen; a second vortex projection; an outer end; a frame; 6.. a main shaft; an eccentric shaft portion; an electric motor; a stator; a rotor; a first recess; a second recess; 9. a phasing component; an oil reservoir; a suction tube; a discharge pipe; an exhaust port; a high pressure chamber; a discharge valve; a cross-shaped ring; a slider; a power supply portion; a compression chamber; connecting the disc portion; an oscillating scroll thrust bearing surface; a boss portion; a reduced thickness portion; 43. a cut-out portion; a thrust plate; a protruding wall; an oil return pipe; a main bearing; 61.. a secondary frame; an oil pump; a secondary bearing; 63.. an oil supply hole; 100. 101, 102. A first quadrant; a second quadrant; a third quadrant; a fourth quadrant; s₁、S₂、S₃...

Claims

1. A scroll compressor is characterized by comprising:

a fixed scroll having a fixed platen provided with a first swirl protrusion;

an oscillating scroll having an oscillating platen provided with a second scroll projection engaged with the first scroll projection, the oscillating scroll forming a compression chamber for compressing refrigerant with the fixed scroll;

a frame that supports the oscillating scroll so as to be freely oscillated; and

a main body housing that houses the fixed scroll, the oscillating scroll, and the frame,

the fixed scroll and the frame are fixed to an inner wall surface of the main body casing,

a first recess for phase alignment for assembly is formed in a surface of the fixed platen on a side opposite to the frame,

a second recess for phase alignment for assembly is formed in the frame at a position opposed to the first recess.

2. The scroll compressor of claim 1,

the first recess is formed radially outward of a region of the fixed platen where the first whirlpool protrusion is provided.

3. The scroll compressor of claim 2,

a common phase fixing member is inserted into the first recess and the second recess.

4. The scroll compressor of any one of claims 1-3,

the frame is disposed with a target space between an end surface of the frame on the side supporting the orbiting scroll and the fixed platen.

5. The scroll compressor of claim 4,

the fixed platen of the fixed scroll has a connecting disc portion that protrudes toward the frame and is formed with the first recess,

the frame is disposed so that an end surface on a side supporting the orbiting scroll is spaced apart from the connecting plate portion by the target interval.

6. The scroll compressor of claim 5,

the connecting disc portion is arranged to be spaced apart from the frame by a distance larger than a plate thickness of the swing platen.

7. The scroll compressor of claim 5,

the connecting disc portion is arranged to be spaced from the frame by an interval smaller than a plate thickness of the swing platen,

a reduced thickness portion is formed in the swing platen, and enters a gap provided between the connecting disk portion and the frame.

8. The scroll compressor of claim 6 or 7,

the swing bedplate is a structure that a part of the swing bedplate always enters between the connecting disc part and the frame in the revolution motion of the swing scroll; or a part of the orbiting scroll may enter between the connecting plate and the frame at least once during the orbiting motion of the orbiting scroll.

9. The scroll compressor of claim 6 or 7,

a straight line connecting a center portion of the swing platen and an outer end portion of the second vortex projection portion is defined as an X-axis, a straight line passing through the center portion of the swing platen and orthogonal to the X-axis is defined as a Y-axis, and the straight line is divided into four quadrants by the X-axis and the Y-axis.

10. The scroll compressor of claim 9,

the connecting disc portion is located in the second quadrant or the third quadrant when projected on an XY plane composed of an X axis and a Y axis.

11. The scroll compressor of any one of claims 1-3,

the first recess is a through hole penetrating the fixed platen.

12. The scroll compressor of any one of claims 1-3,

the main body case has:

a cylindrical main housing;

an upper housing blocking an upper surface opening of the main housing; and

a lower case blocking a lower surface opening of the main case,

the fixed scroll and the frame are fixed to an inner wall surface of the main casing.

13. The scroll compressor of any one of claims 1-3,

the scroll compressor further includes a cross ring having a cross claw projecting upward and housed in a cross groove formed in the orbiting scroll, and a cross claw projecting downward and housed in a cross key groove formed in the frame.

14. The scroll compressor of claim 1,

the first recess and the second recess are formed in a space surrounded by the fixed scroll, the orbiting scroll, the frame, and the body casing.

15. A method of manufacturing a scroll compressor according to claim 1, comprising:

fixing the frame to an inner wall surface of the main body case;

inserting a phase fixing member into the first recess and the second recess to fix the phase of the fixed scroll and the frame;

fixing the fixed platen to an inner wall surface of the main body casing;

and a step of pulling out the phase fixing member from the first recess and the second recess.